Various sites that I've either found interesting or useful.

Me

読書メーター
My Bookmeter account (basically Japanese Goodreads). Click on 本棚 on the left for a list of my favourites.

Blogs

Hau~ Omochikaeri~!
English eroge-centric blog that's no longer actively updated.

ただひたすら何かをあつめてるよ
Japanese hobby blog where the owner documents their collection. Mostly toys and retro games but also includes things like cameras, books, board games and more.

安酒喰らったアヒル
Another Japanese hobby blog with a focus on garage kits and electronics.

Websites

キミラノ
Light novel info site owned by the Kadokawa Group. Useful for keeping track of upcoming releases from various labels, as well as searching for something new to read via the tags.

Music Theory for the 21st-Century Classroom
Free online college music theory textbook.

FOOL LOVERS
Free website templates.

Bonnibel's Graphic Collection
A collection of pixels to decorate your site with.

Stories/Articles

The Graphing Calculator Story
I want to be this type of creator.